Core Viewpoint - The ancient irrigation system along the Yongding River in Beijing, consisting of five ancient canals, has been modernized and continues to play a crucial role in agricultural development and water management in the region, recently recognized as a World Irrigation Heritage site [13]. Group 1: Historical Context - The Yongding River has a history of flooding, prompting local residents to construct five ancient canals to manage water flow and irrigation [1]. - The irrigation system includes the ancient canals of Fujia Tai, Dingjia Tan, Gongyi Gully, Sanjiadian, and Chenglong, which have been preserved and modernized over time [13][27]. Group 2: Agricultural Impact - Fujia Tai village has seen a significant increase in apple production, with larger fruit sizes and higher yields attributed to the irrigation provided by the ancient canal [14][16]. - The village now has over 500 acres of orchards benefiting from the ancient irrigation system, with farmers earning substantial incomes from high-value crops [16]. Group 3: Modern Developments - The ancient canals have undergone modernization, including the construction of concrete structures and regular maintenance to ensure their functionality [16][19]. - The Chenglong canal is being upgraded to enhance water supply to five rivers in the region, aiming to improve water resource management [23]. Group 4: Cultural Significance - The irrigation heritage is intertwined with local culture, as seen in the continuation of the Yongding River Culture Festival, which promotes water culture and local traditions [27]. - The ancient canals and associated structures are recognized as important cultural and historical assets, contributing to the region's identity and agricultural practices [26].

Core Viewpoint - The Beijing Mentougou Yongding River Ancient Canal Irrigation Project has been recognized as a World Irrigation Heritage, showcasing ancient water management wisdom and its continued relevance in modern agricultural and ecological practices [1][3][10]. Group 1: Historical Significance - The ancient irrigation system consists of five canals and has historically irrigated up to 66,000 acres, supporting the grain supply and coal transport for Beijing during the Yuan, Ming, and Qing dynasties [3][4]. - The canals have been in use for over 900 years, with the earliest, the Gongyigou Canal, dating back to 1099, still irrigating 354 acres today [5][6]. Group 2: Modern Applications - The ancient canals continue to serve vital functions, such as flood control, agricultural irrigation, and ecological conservation, demonstrating their adaptability to contemporary needs [1][4][10]. - The irrigation system has been integrated into local agriculture, with villagers now primarily cultivating high-value crops like Fuji apples, leading to increased economic prosperity [4][10]. Group 3: Innovative Management - The ancient canals utilize traditional methods to manage water levels effectively, including the use of adjustable barriers to control water flow and prevent flooding [7][9]. - The design of the canals incorporates a reverse slope to facilitate sedimentation, reducing maintenance needs and enhancing efficiency [7][8]. Group 4: Future Development - The project aims to explore new opportunities by linking irrigation heritage with cultural tourism, enhancing local resources and promoting ecological sustainability [9][10]. - Future plans include the integration of smart water management systems and the promotion of a cultural heritage corridor that combines water management with cultural narratives [10].